Used by Referees in Games
This page is the CodyCross answer for the clue below from Seasons, Group 62, Puzzle 1 (Summer Solstice).
Question is: Used by Referees in Games
and the answer is: WHISTLE
Word Meaning:
WHISTLE — A device designed to be placed in the mouth and blown, or driven by steam or some other mechanism, to make a whistling sound.
Definitions from Wiktionary.